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National Drinking Water Database

Combined Uranium (mg/L) in North Dakota

Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture. [read more]

The Most Polluted Communities in North Dakota

16 water utilities reported detecting Combined Uranium (mg/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Uranium (mg/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
1City of Bottineau
Bottineau, ND
2,3369 of 924.43 ppb
(18.5 to 49.5 ppb)
2City of Lignite
Lignite, ND
1745 of 523.46 ppb
(18 to 29 ppb)
3City of Lehr
Lehr, ND
1141 of 14.8 ppb
(4.8 ppb)
4City of Medina
Medina, ND
3354 of 44.76 ppb
(3.32 to 5.72 ppb)
5City of Cathay
Cathay, ND
561 of 13.25 ppb
(3.25 ppb)
6City of Hague
Hague, ND
913 of 41.07 ppb
(0 to 3.15 ppb)
7Lake Shure Home Owners Association
Harwood, ND
752 of 20.86 ppb
(0.21 to 1.51 ppb)
8Central Plains Water District
Fessenden, ND
2,3971 of 10.49 ppb
(0.49 ppb)
9City of Dazey
Dazey, ND
914 of 50.49 ppb
(0 to 1 ppb)
10City of Bismarck
Bismarck, ND
55,5321 of 10.43 ppb
(0.43 ppb)

Health Based Limits for Combined Uranium (mg/L)

Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.5 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.20 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.30 ppb

Violation Summary for Combined Uranium (mg/L) in North Dakota

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in North Dakota since 2004

Violation TypeNumber of Violations
Failure to monitor regularly4